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MCR03EZPFX1211 Equivalent & Substitute Parts
Part Overview
The MCR03EZPFX1211 is a 1.21 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1.21 kOhms |
| Tolerance | ±1% |
| Power Rating | 0.1W (1/10W) |
| Package / Case | 0603 (1608 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the MCR03EZPFX1211 is determined by strict equivalence across the following parameters: resistance value (1.21 kOhms), tolerance (±1%), power rating (0.1W), package type (0603), composition (thick film), temperature coefficient (±100ppm/°C), and operating temperature range (-55°C to 155°C). All substitute parts listed maintain these core electrical and mechanical specifications.
Substitute parts are grouped into two categories:
Direct Substitutes maintain full automotive AEC-Q200 certification and identical electrical characteristics. These parts are MCR03ERTF1211 (Rohm Semiconductor), CRCW06031K21FKEA and CRCW06031K21FKEB (Vishay Dale), ERJ-3EKF1211V (Panasonic Electronic Components), and RMCF0603FT1K21 (Stackpole Electronics Inc).
Similar Substitutes meet all core electrical and mechanical parameters but feature moisture-resistant construction instead of automotive AEC-Q200 certification. These parts are CR0603-FX-1211ELF (Bourns Inc.) and RC0603FR-071K21L (YAGEO).
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Op. Temp Range | AEC-Q200 | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| MCR03EZPFX1211 | Rohm Semiconductor | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Discontinued | 682 Pcs |
| MCR03ERTF1211 | Rohm Semiconductor | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Discontinued | 849 Pcs |
| CRCW06031K21FKEA | Vishay Dale | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 37453 Pcs |
| CRCW06031K21FKEB | Vishay Dale | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Discontinued | 20064 Pcs |
| ERJ-3EKF1211V | Panasonic Electronic Components | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 156599 Pcs |
| RMCF0603FT1K21 | Stackpole Electronics Inc | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 166892 Pcs |
| CR0603-FX-1211ELF | Bourns Inc. | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 108336 Pcs |
| RC0603FR-071K21L | YAGEO | 1.21 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 996767 Pcs |
Engineering Selection Recommendations
For applications requiring automotive AEC-Q200 compliance, select from active parts: CRCW06031K21FKEA (Vishay Dale), ERJ-3EKF1211V (Panasonic Electronic Components), or RMCF0603FT1K21 (Stackpole Electronics Inc). These three parts maintain full AEC-Q200 certification and are currently in active production status.
For non-automotive applications where AEC-Q200 certification is not required, CR0603-FX-1211ELF (Bourns Inc.) and RC0603FR-071K21L (YAGEO) are suitable alternatives with moisture-resistant construction and significantly higher inventory availability.
All listed substitutes are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited), matching the original part's environmental compliance profile.
Frequently Asked Questions (FAQ)
Q: Can I use a non-AEC-Q200 rated substitute in an automotive application?
A: No. If your application requires automotive qualification, use only parts with AEC-Q200 certification: CRCW06031K21FKEA, ERJ-3EKF1211V, or RMCF0603FT1K21. The original MCR03EZPFX1211 carries AEC-Q200 rating, and substitutes must maintain this certification for automotive use.
Q: Are there dimensional differences between substitute parts?
A: Minor dimensional variations exist within the 0603 package specification. Length ranges from 0.061" to 0.063" (1.55mm to 1.60mm), and height ranges from 0.020" to 0.022" (0.50mm to 0.55mm). These variations remain within standard 0603 tolerances and do not affect PCB assembly compatibility.
Q: What is the difference between Direct and Similar substitutes?
A: Direct substitutes maintain AEC-Q200 automotive certification. Similar substitutes meet all electrical and mechanical specifications but feature moisture-resistant construction without automotive qualification. Selection depends on application requirements.
Q: Which substitute has the best inventory availability?
A: RC0603FR-071K21L (YAGEO) has the highest inventory at 996,767 pieces. For AEC-Q200 applications, RMCF0603FT1K21 (Stackpole Electronics Inc) offers the best availability at 166,892 pieces.
Q: Are all substitutes ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the original MCR03EZPFX1211.
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